“self-acting door”的概念、定义、翻译、参考文献-科学参考

单词	self-acting door
释义	self-acting door [`self ¦ak·tiŋ `dȯr] ^{MINING ENGINEERING} A ventilation door that is constructed of two halves which move on small pulleys and which are forced apart centrally as the trams come in contact with the converging beams that operate the door.
随便看	Buntsandstein Bunyaviridae Bunyavirus buoy buoyage buoyancy buoyancy parameter buoyancy pontoons buoyancy tank buoyancy-type density transmitter buoyant density buoyant force buoy sensor Buprestidae Buprestoidea Burali-Forti paradox buran burble burble angle burble point burden Burdigalian buret burga Burgers vector

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